Initial commit: SUB-OS 64-Bit Production Monolithic Operating System with LazyBox userland suite

include/lib/bitmap.h

@@ -0,0 +1,26 @@
+#ifndef _LIB_BITMAP_H
+#define _LIB_BITMAP_H
+
+#include <stdint.h>
+#include <stddef.h>
+#include <stdbool.h>
+
+typedef uint64_t bitmap_word_t;
+#define BITS_PER_WORD (sizeof(bitmap_word_t) * 8)
+
+static inline void bitmap_set(bitmap_word_t* map, size_t bit) {
+    map[bit / BITS_PER_WORD] |= ((bitmap_word_t)1 << (bit % BITS_PER_WORD));
+}
+
+static inline void bitmap_clear(bitmap_word_t* map, size_t bit) {
+    map[bit / BITS_PER_WORD] &= ~((bitmap_word_t)1 << (bit % BITS_PER_WORD));
+}
+
+static inline bool bitmap_test(const bitmap_word_t* map, size_t bit) {
+    return (map[bit / BITS_PER_WORD] & ((bitmap_word_t)1 << (bit % BITS_PER_WORD))) != 0;
+}
+
+int64_t bitmap_find_first_free(const bitmap_word_t* map, size_t total_bits);
+int64_t bitmap_find_contiguous_free(const bitmap_word_t* map, size_t total_bits, size_t count);
+
+#endif // _LIB_BITMAP_H